US5413414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide sleeve for a length-adjustable column for chairs or tables
Assignee: Suspa Holding GmbH
•
Filing: 1993-01-22
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Granted: 1995-05-09
•
Expires: 2013-01-22
Abstract
Abstract A guide sleeve for a length-adjustable column for chairs is provided with an outside to be received and supported in a guide tube of the column. The guide sleeve is further provided with an internal surface, on which guide webs are formed which project towards a central longitudinal axis. The guide webs are separated from each other by recesses. On the guide webs, there are partial cylinder surfaces concentric of the axis and which are formed as guide surfaces for the housing of a length-adjustable element.
Inventors
- 👤 Hans J. Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:53
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
A guide sleeve for a length-adjustable column for chairs or tables, of which an outside is formed to be received and supported in a guide tube (2) of the column and which is provided on an internal surface (8) with a guide surface concentric of a central longitudinal axis (4) to guide a cylindrical housing (9) of an adjusting element (10) and which is made in one piece of plastic material, wherein guide webs (110) are formed on said internal surface (8) which project towards the central longitudinal axis (4) and which are separated from each other by recesses (13) and wherein, produced on the guide webs (11) by chip removal, partial cylinder surfaces (12) concentric of the axis (4) are formed as guide surfaces for the housing (9) and wherein it is provided with rib webs (5) which project outwards radially to the central longitudinal axis (4) and wherein the guide webs (11) are arranged radially to the central longitudinal axis (4) each in alignment with the rib webs (5).
Claim 2
Dependent Claim
171 words
A guide sleeve for a length-adjustable column for chairs or tables, of which an outside is formed to be received and supported in a guide tube (2) of the column and which is provided on an internal surface (8) with a guide surface concentric of a central longitudinal axis (4) to guide a cylindrical housing (9) of an adjusting element (10) and which is made in one piece of plastic material, wherein guide webs (110) are formed on said internal surface (8) which project towards the central longitudinal axis (4) and which are separated from each other by recesses (13) and wherein, produced on the guide webs (11) by chip removal, partial cylinder surfaces (12) concentric of the axis (4) are formed as guide surfaces for the housing (9) and wherein it is provided with rib webs (5) which project outwards radially to the central longitudinal axis (4) and wherein the guide webs (11) are arranged radially to the central longitudinal axis (4) each in alignment with the rib webs (5).
Claim 3
Dependent Claim
33 words
A guide sleeve according to claim 1, wherein the width (a) of the recesses (13) in the circumferential direction exceeds the width (b) of the partial cylinder surfaces (12) in the circumferential direction.
Claim 4
Dependent Claim
21 words
A guide sleeve according to claim 1, wherein a lubricant (14) is arranged in at least one of said recesses (13).
Claim 5
Dependent Claim
17 words
A guide sleeve according to claim 1, wherein the partial cylinder surfaces (12) are formed by broaching.
Claim 6
Dependent Claim
37 words
A guide sleeve according to claim 1, wherein the height (c) of the guide webs (11) in a direction radial to the central longitudinal axis (4) is smaller that the width (b) of the guide webs (11).
Claim 7
Dependent Claim
50 words
A guide sleeve according to claim 1, wherein--in each case referred to the central longitudinal axis (4)--the relation R13>R12≧R9 applies to the radius R12 of the partial cylinder surfaces (12) and to the radial distance R13 of the recesses (13) in relation to the radius R9 of the housing (9).
Claim 8
Dependent Claim
24 words
A guide sleeve according to claim 1, wherein the partial cylinder surfaces (12) are arranged at equal angular distances in relation to each other.
Claim 9
Dependent Claim
29 words
A guide sleeve according to claim 1, wherein the guide webs (11) with the partial cylinder surfaces (12) extend substantially over the full length of the guide sleeve (1).
Claim 10
Dependent Claim
16 words
A guide sleeve according to claim 1, wherein at least six guide webs (11) are provided.
Claim 11
Dependent Claim
30 words
A guide sleeve according to claim 1, wherein the guide webs (11) with the partial cylinder surfaces (12) are arranged straight and extending in parallel to the central longitudinal axis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-08 | 1998-11-07 | 1999-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-08 | 2002-11-07 | 2003-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-08 | 2006-11-07 | 2007-05-09 | $7700.00 | Window Closed / Lapsed |